EP2711200B1 - Pneumatic tyre for a vehicle - Google Patents

Pneumatic tyre for a vehicle Download PDF

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Publication number
EP2711200B1
EP2711200B1 EP13180011.2A EP13180011A EP2711200B1 EP 2711200 B1 EP2711200 B1 EP 2711200B1 EP 13180011 A EP13180011 A EP 13180011A EP 2711200 B1 EP2711200 B1 EP 2711200B1
Authority
EP
European Patent Office
Prior art keywords
groove
profile
circumferential
pneumatic vehicle
vehicle tyre
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13180011.2A
Other languages
German (de)
French (fr)
Other versions
EP2711200A1 (en
Inventor
Ulrich Behr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Reifen Deutschland GmbH
Original Assignee
Continental Reifen Deutschland GmbH
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Filing date
Publication date
Application filed by Continental Reifen Deutschland GmbH filed Critical Continental Reifen Deutschland GmbH
Publication of EP2711200A1 publication Critical patent/EP2711200A1/en
Application granted granted Critical
Publication of EP2711200B1 publication Critical patent/EP2711200B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0306—Patterns comprising block rows or discontinuous ribs
    • B60C11/0309—Patterns comprising block rows or discontinuous ribs further characterised by the groove cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0353—Circumferential grooves characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0355—Circumferential grooves characterised by depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/036—Narrow grooves, i.e. having a width of less than 3 mm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/0367—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth
    • B60C2011/0369—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by depth with varying depth of the groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
    • B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0381—Blind or isolated grooves

Definitions

  • the invention relates to a pneumatic vehicle tire having a tread profile, which is divided by circumferential grooves and circumferentially encircling profile positive, such as profile bands and / or profile block rows, wherein at least one profile positive is provided in which transverse grooves are arranged, which open into a profile positive limiting circumferential groove and the ends of which are located within the profile positive, wherein the transverse grooves are bounded on the surface of the profile of positive boundary edges whose mutual distance in the direction of the circumferential groove is larger.
  • the transverse grooves extending into the profile positives usually have a U-shaped cross-section and end bluntly within the profile positive.
  • the end portions of the transverse grooves are usually limited by a kind of end wall, which extends in the radial direction, starting from the groove bottom to the surface of the profile positive and thus forms the blunt end of the transverse groove.
  • a pneumatic vehicle tire of the type mentioned is for example from the EP 1 580 032 A1 known.
  • the tread of this tire has tread bands or block rows provided with blind grooves as transverse grooves extending from a circumferential groove into the tread band or tread block and inclined at an acute angle to the rolling direction of the mounted tire.
  • These blind grooves each have one of the selected rolling direction facing groove edge and this opposite one of the rolling direction facing away from the groove side.
  • the groove flank facing away from the unwinding direction has a flank surface whose inclination changes continuously with respect to the radial direction over its extent, so that the flank surface encloses its greatest angle with the radial direction in the circumferential groove.
  • the opposite flank surface extends at least substantially in the radial direction.
  • Pneumatic vehicle tires which should have a good transmission of steering forces, driving and braking forces even at high speeds, need profile positive in the tread, which ensure a comparatively high circumferential and lateral stiffness.
  • conventional tread configurations there is often a trade-off between optimization of dry handling, hence good power transmission, and optimization of wet handling, ie drainage properties and aquaplaning behavior of the tire. Measures to improve dry handling usually result in a deterioration of wet handling.
  • the transverse grooves have a large width in order to ensure a good drainage of the tread in the direction of the circumferential grooves. The wider the transverse grooves, the lower the positive portion of the profile elements, whereby the stiffness of the profile elements suffers.
  • the invention is therefore based on the object to perform a tread of a pneumatic vehicle tire of the type mentioned in such a way that the above-mentioned conflict of objectives between dry handling and wet handling is solved as well as possible.
  • transverse grooves Due to this special design of the transverse grooves with a base groove and groove flanks to the surface of the profile positive, the negative portion of the tread is increased in the near-surface region of the profile positive, without the rigidity of the profile positive being reduced. With transverse grooves according to the invention, therefore, a comparatively large amount of water can be conducted to the circumferential groove, which is a main drainage source, in the region near the surface.
  • the groove flanks which do not extend to the full groove depth, stabilize the boundary edges of the transverse grooves on the surface of the profile positive and prevent the formation of curling effects.
  • the narrow base grooves contribute to the stabilization of the Profilpositives and also have a "joint function", when rolling the tire, they facilitate a flattening of the tire in the footprint.
  • transverse grooves as possible turbulence-free flow according to the invention transverse grooves is advantageous, which is supported according to the invention in that the radial distance of the common edge formed between the one base groove wall and the subsequent groove edge to the surface of the profile positive on the circumferential groove 3 mm 5 mm, and further that the radial distance of the common edge formed between the base groove surface projecting beyond the base groove and the second groove flank toward the surface of the profile positive at the circumferential groove is 2 mm to 3 mm.
  • the transverse grooves are arranged in a profile band in such a way that these differently executed groove flanks connect at a part of the transverse grooves to the incoming edges and at a part of the transverse grooves to the outgoing edges.
  • the groove flanks have at the inner end of the base groove an approximately equal radial distance to the surface of the profile positive, which is smaller than the radial distances of said common edges on the circumferential groove and preferably at most 1 mm. Accordingly, the transverse groove has the relevant for a good drainage features, namely increasing the circumferential groove depth and increasing the circumferential groove width on.
  • the groove flanks are at least substantially equally large angles inclined surfaces relative to the radial direction.
  • the boundary edges of the transverse groove running on the surface of the profile positive extend in a pointed manner at the transverse groove end in accordance with a further preferred embodiment of the invention. This measure provides above all for a stabilization of the tread inside end portions of the transverse grooves in the forces occurring during operation of the tire.
  • a further measure according to the invention which optimizes the drainage effect of the transverse grooves according to the invention, is that the groove flanks extend in the axial direction of extension of the base groove beyond the end thereof in the positive profile up to the point of intersection of the boundary edges present on the surface of the profile positive.
  • inventive transverse grooves is optimized by a further measure for the two possible Abrollidesen the tire, namely the fact that the provided on the surface of the profile positive limiting edges have different sized acute angle to the center line of the base groove.
  • the base groove there is an optimum range of extension of the base groove to ensure the "hinge effect" of the transverse grooves as mentioned above while providing good stiffness of the profile positive and good drainage action of the transverse grooves.
  • the advantageous extension length of the base groove in this respect is between 50% and 80% of the total extension length of the transverse groove.
  • transverse grooves according to the invention in a profile band of the tread bordered on both sides by circumferential grooves takes place in particular in such a way that the transverse grooves in the circumferential direction open alternately into the one and the other circumferential groove. This measure is advantageous for the stiffness of the profile band and good drainage properties.
  • the transverse grooves are further arranged with respect to the axial direction so that they extend at an angle of up to 50 ° to this. This measure is favorable for minimizing the rolling noise.
  • At least one profile strip is provided in the tread, in which all transverse grooves extend at substantially coincident angles to the axial direction.
  • the FIGS. 1 . 2 and 8th The profiled strip 1 has a width of in particular 2 cm to 3.5 cm on each of the tread in the circumferential direction just circumferential circumferential groove 2, 3rd limited.
  • profile positives can also be profiled bands, with or without transverse grooves according to the invention, or profile block rows, which are designed in a manner known per se.
  • Fig. 1 and Fig. 2 To the left of the profile band 1 extending circumferential groove 2 is, as for example Fig. 3 shows, bounded by two in the radial direction R or substantially in the radial direction R groove walls 2b and 2c and extending in cross-section in the axial direction groove bottom 2a.
  • the groove bottom 2a is located in the intended for the relevant vehicle pneumatic tire maximum tread depth T P , the opening width b 2 of the circumferential groove 2 on the surface of the profile strip 1 corresponds to the width of the groove bottom 2a.
  • the opening width b 2 of the circumferential groove 2 on the surface of the profile strip 1 corresponds to the width of the groove bottom 2a.
  • To the right of the profile band 1 extending circumferential groove 3 is an example of those in which a transverse groove 4 shown in these figures opens.
  • the circumferential groove 3 has, as in particular Fig. 3 can be seen, extending in cross-section in the axial direction groove bottom 3a and two groove walls 3b, 3c.
  • the groove wall 3c opposite the profile band 1 runs in the radial direction R.
  • the groove wall 3c is the one into which the transverse groove 4 opens and is slightly inclined with respect to the radial direction, in particular at an angle of 1 ° to 10 °, such that the opening width b 3 of the circumferential groove 3 on the surface of the profile strip 1 has a greater axial extent than the groove bottom 3a.
  • the width of the circumferential grooves 2, 3 at the groove bottom 2a, 3a is, as is usual for such circumferential grooves, between 6 mm and 18 mm, the maximum tread depth T P is depending on the tire type and tire dimension usually between 6 mm and 8.5 mm.
  • transverse groove 4 extends by way of example in the axial direction.
  • transverse grooves 4 alternatively extend at an acute angle ⁇ to the axial direction, which is at most 50 °, in particular up to 35 °.
  • angle ⁇ is on the order of 30 °.
  • the angle ⁇ is determined between the center line a in the extending direction of a base groove 5 and the axial direction.
  • the transverse groove 4 On the surface of the profile strip 1, the transverse groove 4 has boundary edges k 1 , k 2 , which in plan view essentially form the sides of an elongated, equilateral triangle whose smallest angle is formed is located at the end of the transverse groove 4 in the profile band 1, so that the width of the transverse grooves 4 in the direction of the circumferential groove 3 is larger.
  • the boundary edge k 1 encloses with the center line a an angle ⁇ 1 , which is between 5 ° and 15 °
  • the boundary edge k 2 includes with the center line a an angle ⁇ 2 , which is greater than ⁇ 1 by up to 5 °
  • the tread inside end of the transverse groove 4 is located in a distance n determined in the axial direction of the circumferential groove 2, which is at least 5 mm.
  • the transverse groove 4 itself has an extension length 1, which is determined on the surface of the profile strip 1, and in the order of 12 mm to 25 mm.
  • the transverse groove 4 has in combination the already mentioned base groove 5 and two radially outwardly of the base groove 5 formed groove flanks 6, 7, which widen the transverse groove 4 in cross section in a funnel shape to the surface of the profile strip 1.
  • the base groove 5 is located in the radially inner region of the transverse groove 4 and extends from the circumferential groove 3 in a straight line in the profile band 1 over an extension length l 1 of 50% to 80% of the extension length l.
  • the base groove bottom 5c is located over the extension length l substantially at a constant depth T E (FIG. Fig. 7 ), which corresponds to the radial distance of the recess base 5c to the surface of the profile strip 1.
  • the base groove 5 has a constant width of 0.8 mm to 1.5 mm and two mutually parallel base groove walls 5a, 5b.
  • the radial extent of the base groove 5 is determined by the radial extent of the base groove wall 5a, which has a common edge k 3 with the groove flank 7, which, as it Fig. 5 shows, from the inner end to the groove wall 3c "drops" and the radial distance c 2 to the surface of the profile strip 1 on the groove wall 3c 5 mm to 7 mm and at its inner end is about 1 mm.
  • the base groove wall 5b has with the groove flank 6 a common edge k 4 , which also "drops" from its inner end to the groove wall 3c and the radial distance c 1 to the surface of the profile strip 1 on the groove wall 3c 2 mm to 3 mm, at its inner End is about 1 mm.
  • the two groove flanks 6, 7 thus, viewed in the groove cross-section, run asymmetrically to the center line a and beyond the end of the base groove 5 in the profile band 1 to the intersection of the boundary edges k 1 and k 2 on the surface of the profile band 1
  • Direction include the groove flanks 6, 7 angles ⁇ , ⁇ , which are selected between 30 ° and 70 ° and can be consistently large.
  • the angle ⁇ of the areal smaller groove flank 6 is greater, in particular by at least 3 °, than the angle ⁇ of the groove flank. 7
  • Fig. 8 shows a profile band 1 ', which is bounded by circumferentially circumferential grooves 2', 3 ', which are formed analogously to the circumferential groove 3.
  • the transverse grooves 4 are inclined relative to the axial direction at the angle ⁇ of about 30 °. In the embodiment shown, all transverse grooves 4 run coincidentally obliquely to the axial direction.
  • transverse grooves can also be provided in profile blocks.
  • the transverse grooves can be arranged in profile bands in a special way. For example, it is possible to combine in a profile band to the axial direction inclined transverse grooves with extending in the axial direction transverse grooves, for example, in an alternate arrangement in the circumferential direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Description

Die Erfindung betrifft einen Fahrzeugluftreifen mit einem Laufstreifenprofil, welches durch Umfangsrillen und in Umfangsrichtung umlaufende Profilpositive, wie Profilbänder und/oder Profilblockreihen, gegliedert ist, wobei zumindest ein Profilpositiv vorgesehen ist, in welchem Querrillen angeordnet sind, die in eine das Profilpositiv begrenzende Umfangsrille münden und deren Enden sich innerhalb des Profilpositives befinden, wobei die Querrillen an der Oberfläche des Profilpositives von Begrenzungskanten begrenzt sind, deren gegenseitiger Abstand in Richtung Umfangsrille größer wird.The invention relates to a pneumatic vehicle tire having a tread profile, which is divided by circumferential grooves and circumferentially encircling profile positive, such as profile bands and / or profile block rows, wherein at least one profile positive is provided in which transverse grooves are arranged, which open into a profile positive limiting circumferential groove and the ends of which are located within the profile positive, wherein the transverse grooves are bounded on the surface of the profile of positive boundary edges whose mutual distance in the direction of the circumferential groove is larger.

Fahrzeugluftreifen mit derartigen Laufstreifenprofilen sind in verschiedenen Ausführungen bekannt. Die sich in die Profilpositive hinein erstreckenden Querrillen weisen üblicherweise einen U-förmigen Querschnitt auf und enden stumpf innerhalb des Profilpositives. Die Endbereiche der Querrillen sind meist von einer Art Stirnwand begrenzt, welche sich in radialer Richtung ausgehend vom Rillengrund bis zur Oberfläche des Profilpositives erstreckt und derart das stumpfe Ende der Querrille bildet.Pneumatic vehicle tires with such tread profiles are known in various designs. The transverse grooves extending into the profile positives usually have a U-shaped cross-section and end bluntly within the profile positive. The end portions of the transverse grooves are usually limited by a kind of end wall, which extends in the radial direction, starting from the groove bottom to the surface of the profile positive and thus forms the blunt end of the transverse groove.

Ein Fahrzeugluftreifen der eingangs genannten Art ist beispielsweise aus der EP 1 580 032 A1 bekannt. Der Laufstreifen dieses Reifens weist Laufstreifenbänder oder Blockreihen auf, welche mit Sackrillen als Querrillen versehen sind, die sich von einer Umfangsnut ausgehend in das Laufstreifenband oder einen Profilblock erstrecken und zur Abrollrichtung des montierten Reifens unter einem spitzen Winkel geneigt verlaufen. Diese Sackrillen besitzen jeweils eine der gewählten Abrollrichtung zugewandte Nutflanke und dieser gegenüberliegend eine der Abrollrichtung abgewandte Nutflanke. Die der Abrollrichtung abgewandte Nutflanke weist eine Flankenfläche auf, deren Neigung sich gegenüber der radialen Richtung über ihre Erstreckung kontinuierlich ändert, sodass die Flankenfläche bei der Umfangsnut ihren größten Winkel mit der radialen Richtung einschließt. Die gegenüberliegende Flankenfläche verläuft zumindest im Wesentlichen in radialer Richtung.A pneumatic vehicle tire of the type mentioned is for example from the EP 1 580 032 A1 known. The tread of this tire has tread bands or block rows provided with blind grooves as transverse grooves extending from a circumferential groove into the tread band or tread block and inclined at an acute angle to the rolling direction of the mounted tire. These blind grooves each have one of the selected rolling direction facing groove edge and this opposite one of the rolling direction facing away from the groove side. The groove flank facing away from the unwinding direction has a flank surface whose inclination changes continuously with respect to the radial direction over its extent, so that the flank surface encloses its greatest angle with the radial direction in the circumferential groove. The opposite flank surface extends at least substantially in the radial direction.

Fahrzeugluftreifen, die auch bei hohen Geschwindigkeiten eine gute Übertragung von Lenkkräften, Antriebs- und Bremskräften aufweisen sollen, brauchen Profilpositive im Laufstreifen, die eine vergleichsweise hohe Umfangs- und Quersteifigkeit sicherstellen. Bei herkömmlichen Profilausgestaltungen ergibt sich oft ein Zielkonflikt zwischen einer Optimierung des Trockenhandlings, demnach einer guten Kraftübertragung, und einer Optimierung des Nasshandlings, sprich den Entwässerungseigenschaften und dem Aquaplaningverhaltens des Reifens. Maßnahmen zur Verbesserung des Trockenhandlings haben üblicherweise eine Verschlechterung des Nasshandlings zur Folge. Für ein gutes Nasshandling ist es vorteilhaft, wenn die Querrillen eine große Breite aufweisen, um eine gute Entwässerung des Laufstreifens in Richtung der Umfangsrillen sicherzustellen. Je breiter die Querrillen, umso geringer ist der Positivanteil der Profilelemente, wodurch die Steifigkeit der Profilelemente leidet.Pneumatic vehicle tires, which should have a good transmission of steering forces, driving and braking forces even at high speeds, need profile positive in the tread, which ensure a comparatively high circumferential and lateral stiffness. In conventional tread configurations, there is often a trade-off between optimization of dry handling, hence good power transmission, and optimization of wet handling, ie drainage properties and aquaplaning behavior of the tire. Measures to improve dry handling usually result in a deterioration of wet handling. For a good wet handling, it is advantageous if the transverse grooves have a large width in order to ensure a good drainage of the tread in the direction of the circumferential grooves. The wider the transverse grooves, the lower the positive portion of the profile elements, whereby the stiffness of the profile elements suffers.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Laufstreifen eines Fahrzeugluftreifens der eingangs genannten Art derart auszuführen, dass der oben erwähnte Zielkonflikt zwischen Trockenhandling und Nasshandling möglichst gut gelöst wird.The invention is therefore based on the object to perform a tread of a pneumatic vehicle tire of the type mentioned in such a way that the above-mentioned conflict of objectives between dry handling and wet handling is solved as well as possible.

Gelöst wird die gestellte Aufgabe erfindungsgemäß durch die Merkmale des kennzeichnenden Teiles des Anspruches 1.The object is achieved according to the invention by the features of the characterizing part of claim 1.

Durch diese spezielle Ausgestaltung der Querrillen mit einer Basisrille und Rillenflanken zur Oberfläche des Profilpositives wird im oberflächennahen Bereich des Profilpositives der Negativanteil des Laufstreifens vergrößert, ohne dass die Steifigkeit des Profilpositives reduziert wird. Mit erfindungsgemäßen Querrillen kann daher im oberflächennahen Bereich eine vergleichsweise große Menge an Wasser zur Umfangsrille, die eine Hauptentwässerungsquelle darstellt, geleitet werden. Durch die spezielle Anordnung der Rillenflanken wird die "Kantenfunktion" der Querrillen, speziell beim Nassbremsen, verstärkt. Die nicht auf volle Rillentiefe verlaufenden Rillenflanken stabilisieren die Begrenzungskanten der Querrillen an der Oberfläche des Profilpositives und verhindern das Entstehen von Einrolleffekten. Die schmalen Basisrillen tragen zur Stabilisierung des Profilpositives bei und haben darüber hinaus eine "Gelenkfunktion", beim Abrollen des Reifens erleichtern sie eine Abplattung des Reifens im Footprint.Due to this special design of the transverse grooves with a base groove and groove flanks to the surface of the profile positive, the negative portion of the tread is increased in the near-surface region of the profile positive, without the rigidity of the profile positive being reduced. With transverse grooves according to the invention, therefore, a comparatively large amount of water can be conducted to the circumferential groove, which is a main drainage source, in the region near the surface. The special arrangement of the groove flanks, the "edge function" of the transverse grooves, especially during wet braking, reinforced. The groove flanks, which do not extend to the full groove depth, stabilize the boundary edges of the transverse grooves on the surface of the profile positive and prevent the formation of curling effects. The narrow base grooves contribute to the stabilization of the Profilpositives and also have a "joint function", when rolling the tire, they facilitate a flattening of the tire in the footprint.

Für eine optimale Entwässerungswirkung erfindungsgemäßer Querrillen ist eine möglichst verwirbelungsfreie Durchströmung erfindungsgemäßer Querrillen von Vorteil, was gemäß der Erfindung dadurch unterstützt wird, dass der radiale Abstand der zwischen der einen Basisrillenwand und der anschließenden Rillenflanke gebildeten gemeinsamen Kante zur Oberfläche des Profilpositives an der Umfangsrille 3 mm bis 5 mm beträgt, und dass ferner der radiale Abstand der zwischen der über die Basisrille hinausragenden anderen Basisrillenwand und der zweiten Rillenflanke gebildeten gemeinsamen Kante zur Oberfläche des Profilpositives an der Umfangsrille 2 mm bis 3 mm beträgt. Es ist daher auch vorteilhaft, wenn in einem Profilband die Querrillen derart angeordnet werden, dass diese unterschiedlich ausgeführten Rillenflanken bei einem Teil der Querrillen an die einlaufenden Kanten und bei einem Teil der Querrillen an die auslaufenden Kanten anschließen. Die Rillenflanken weisen am inneren Ende der Basisrille einen etwa gleich großen radialen Abstand zur Oberfläche des Profilpositives auf, welcher kleiner ist als die radialen Abstände der erwähnten gemeinsamen Kanten an der Umfangsrille und vorzugsweise höchstens 1 mm beträgt. Demnach weist die Querrille die für eine gute Entwässerung maßgeblichen Merkmale, nämlich eine zur Umfangsrille zunehmende Tiefe und eine zur Umfangsrille zunehmende Breite, auf.For optimum drainage effect according to the invention transverse grooves as possible turbulence-free flow according to the invention transverse grooves is advantageous, which is supported according to the invention in that the radial distance of the common edge formed between the one base groove wall and the subsequent groove edge to the surface of the profile positive on the circumferential groove 3 mm 5 mm, and further that the radial distance of the common edge formed between the base groove surface projecting beyond the base groove and the second groove flank toward the surface of the profile positive at the circumferential groove is 2 mm to 3 mm. It is therefore also advantageous if the transverse grooves are arranged in a profile band in such a way that these differently executed groove flanks connect at a part of the transverse grooves to the incoming edges and at a part of the transverse grooves to the outgoing edges. The groove flanks have at the inner end of the base groove an approximately equal radial distance to the surface of the profile positive, which is smaller than the radial distances of said common edges on the circumferential groove and preferably at most 1 mm. Accordingly, the transverse groove has the relevant for a good drainage features, namely increasing the circumferential groove depth and increasing the circumferential groove width on.

Für die Stabilität des Profilpositives ist es ferner vorteilhaft, wenn die Rillenflanken unter zumindest im Wesentlichen gleich großen Winkeln relativ zur radialen Richtung geneigte Flächen sind.For the stability of the profile positive, it is also advantageous if the groove flanks are at least substantially equally large angles inclined surfaces relative to the radial direction.

Die an der Oberfläche des Profilpositives verlaufenden Begrenzungskanten der Querrille verlaufen gemäß einer weiteren bevorzugten Ausführungsform der Erfindung am Querrillenende spitz zusammen. Diese Maßnahme sorgt vor allem für eine Stabilisierung der laufstreifeninnenseitigen Endbereiche der Querrillen bei den im Betrieb des Reifens auftretenden Kräften.The boundary edges of the transverse groove running on the surface of the profile positive extend in a pointed manner at the transverse groove end in accordance with a further preferred embodiment of the invention. This measure provides above all for a stabilization of the tread inside end portions of the transverse grooves in the forces occurring during operation of the tire.

Eine weitere erfindungsgemäße Maßnahme, die die Entwässerungswirkung der erfindungsgemäßen Querrillen optimiert, besteht darin, dass die Rillenflanken in der axialen Erstreckungsrichtung der Basisrille über deren Ende im Profilpositiv hinaus bis zum Schnittpunkt der Begrenzungskanten, die an der Oberfläche des Profilpositives vorliegen, verlaufen.A further measure according to the invention, which optimizes the drainage effect of the transverse grooves according to the invention, is that the groove flanks extend in the axial direction of extension of the base groove beyond the end thereof in the positive profile up to the point of intersection of the boundary edges present on the surface of the profile positive.

Die Wirkungswiese erfindungsgemäßer Querrillen wird durch eine weitere Maßnahme für die beiden möglichen Abrollrichtungen des Reifens optimiert, nämlich dadurch, dass die an der Oberfläche des Profilpositives vorgesehenen Begrenzungskanten unterschiedlich große spitze Winkel zur Mittellinie der Basisrille aufweisen.The effect of inventive transverse grooves is optimized by a further measure for the two possible Abrollrichtungen the tire, namely the fact that the provided on the surface of the profile positive limiting edges have different sized acute angle to the center line of the base groove.

Bei erfindungsgemäß ausgeführten Rillen gibt es einen optimalen Bereich der Erstreckung der Basisrille, um die "Gelenkwirkung", wie oben erwähnt, der Querrillen sicherzustellen und gleichzeitig für eine gute Steifigkeit des Profilpositives und eine gute Entwässerungswirkung der Querrillen zu sorgen. Die diesbezüglich vorteilhafte Erstreckungslänge der Basisrille beträgt zwischen 50 % und 80 % der gesamten Erstreckungslänge der Querrille.In grooves made in accordance with the present invention, there is an optimum range of extension of the base groove to ensure the "hinge effect" of the transverse grooves as mentioned above while providing good stiffness of the profile positive and good drainage action of the transverse grooves. The advantageous extension length of the base groove in this respect is between 50% and 80% of the total extension length of the transverse groove.

Die Anordnung erfindungsgemäßer Querrillen in einem beidseitig von Umfangsrillen begrenzten Profilband des Laufstreifens erfolgt insbesondere derart, dass die Querrillen in Umfangsrichtung abwechselnd in die eine und in die andere Umfangsrille münden. Diese Maßnahme ist für die Steifigkeit des Profilbandes und gute Entwässerungseigenschaften vorteilhaft.The arrangement of transverse grooves according to the invention in a profile band of the tread bordered on both sides by circumferential grooves takes place in particular in such a way that the transverse grooves in the circumferential direction open alternately into the one and the other circumferential groove. This measure is advantageous for the stiffness of the profile band and good drainage properties.

Die Querrillen werden ferner gegenüber der axialen Richtung derart angeordnet, dass sie unter einem Winkel von bis zu 50° zu dieser verlaufen. Diese Maßnahme ist günstig für eine Minimierung des Abrollgeräusches.The transverse grooves are further arranged with respect to the axial direction so that they extend at an angle of up to 50 ° to this. This measure is favorable for minimizing the rolling noise.

Sowohl für ein gutes Trockenhandling als auch ein gutes Nasshandling ist es ferner vorteilhaft, wenn im Laufstreifen zumindest ein Profilband vorgesehen ist, in welchem sämtliche Querrillen unter im Wesentlichen übereinstimmenden Winkeln zur axialen Richtung verlaufen.Both for a good dry handling and a good wet handling, it is also advantageous if at least one profile strip is provided in the tread, in which all transverse grooves extend at substantially coincident angles to the axial direction.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der Zeichnung, die Ausführungsbeispiele darstellt, näher beschrieben. Dabei zeigen

  • Fig. 1 eine Schrägansicht eines Abschnittes eines Profilbandes mit einer erfindungsgemäß ausgeführten Querrille,
  • Fig. 2 eine Draufsicht auf den Abschnitt des Profilbandes aus Fig. 1,
  • Fig. 3 eine Schnittdarstellung gemäß der Schnittlinie III-III der Fig. 2,
  • Fig. 4 eine Schnittdarstellung gemäß der Schnittlinie IV-IV der Fig. 2,
  • Fig 5 eine Schnittdarstellung gemäß der Schnittlinie V-V der Fig. 2,
  • Fig. 6 eine Schnittdarstellung gemäß der Schnittlinie VI-VI der Fig. 2,
  • Fig. 7 eine Ansicht eines Abschnittes einer das Profilband begrenzenden Rillenwand in Richtung des Pfeiles P der Fig. 2 und
  • Fig. 8 eine Draufsicht auf einen Umfangsabschnitt eines Profilbandes mit mehreren gemäß der Erfindung ausgeführten Querrillen.
Further features, advantages and details of the invention will now be described with reference to the drawing illustrating embodiments. Show
  • Fig. 1 an oblique view of a portion of a profile strip with a transverse groove according to the invention,
  • Fig. 2 a plan view of the section of the profile strip Fig. 1 .
  • Fig. 3 a sectional view taken along section line III-III of Fig. 2 .
  • Fig. 4 a sectional view according to the section line IV-IV of Fig. 2 .
  • Fig. 5 a sectional view according to the section line VV of Fig. 2 .
  • Fig. 6 a sectional view according to the section line VI-VI of Fig. 2 .
  • Fig. 7 a view of a portion of the profile band limiting groove wall in the direction of the arrow P of Fig. 2 and
  • Fig. 8 a plan view of a peripheral portion of a profile strip having a plurality of transverse grooves according to the invention.

Die Figuren 1, 2 und 8 zeigen jeweils einen in Umfangsrichtung eines Laufstreifenprofils eines PKW-Fahrzeugluftreifens in radialer Bauart verlaufenden Abschnitt eines Profilbandes 1. Das Profilband 1 weist eine Breite von insbesondere 2 cm bis 3,5 cm auf ist von je einer das Laufstreifenprofil in Umfangsrichtung gerade umlaufenden Umfangsrille 2, 3 begrenzt.The FIGS. 1 . 2 and 8th The profiled strip 1 has a width of in particular 2 cm to 3.5 cm on each of the tread in the circumferential direction just circumferential circumferential groove 2, 3rd limited.

Seitlich der Umfangsrillen 2, 3 schließen weitere Profilpositive an, die in Fig. 2 lediglich angedeutet sind. Diese Profilpositive können ebenfalls Profilbänder, mit oder ohne erfindungsgemäß ausgeführten Querrillen, oder Profilblockreihen, welche in an sich bekannter Weise ausgeführt sind, sein. Die in Fig. 1 und Fig. 2 links vom Profilband 1 verlaufende Umfangsrille 2 ist, wie es beispielsweise Fig. 3 zeigt, von zwei in radialer Richtung R oder im Wesentlichen in radialer Richtung R verlaufenden Rillenwänden 2b und 2c und einem im Querschnitt in axialer Richtung verlaufenden Rillengrund 2a begrenzt. Der Rillengrund 2a befindet sich in der für den betreffenden Fahrzeugluftreifen vorgesehenen maximalen Profiltiefe TP, die Öffnungsbreite b2 der Umfangsrille 2 an der Oberfläche des Profilbandes 1 entspricht der Breite des Nutgrundes 2a. Die in Fig. 1 und Fig. 2 rechts vom Profilband 1 verlaufende Umfangsrille 3 ist hier beispielhaft jene, in welche eine in diesen Figuren gezeigte Querrille 4 mündet. Die Umfangsrille 3 weist, wie es insbesondere Fig. 3 zu entnehmen ist, einen sich im Querschnitt in axialer Richtung erstreckenden Rillengrund 3a und zwei Rillenwände 3b, 3c auf. Die dem Profilband 1 gegenüberliegende Rillenwand 3b verläuft in radialer Richtung R. Die Rillenwand 3c ist jene, in welche die Querrille 4 mündet und ist gegenüber der radialen Richtung geringfügig, insbesondere um einen Winkel von 1° bis 10° geneigt, derart, dass die Öffnungsbreite b3 der Umfangsrille 3 an der Oberfläche des Profilbandes 1 eine größere axiale Erstreckung aufweist als der Rillengrund 3a. Die Breite der Umfangsrillen 2, 3 am Rillengrund 2a, 3a beträgt, wie es für derartige Umfangsrillen üblich ist, zwischen 6 mm und 18 mm, die maximale Profiltiefe TP beträgt je nach Reifentyp und Reifendimension üblicherweise zwischen 6 mm und 8,5 mm.Laterally of the circumferential grooves 2, 3 connect further profile positive, in Fig. 2 are merely indicated. These profile positives can also be profiled bands, with or without transverse grooves according to the invention, or profile block rows, which are designed in a manner known per se. In the Fig. 1 and Fig. 2 To the left of the profile band 1 extending circumferential groove 2 is, as for example Fig. 3 shows, bounded by two in the radial direction R or substantially in the radial direction R groove walls 2b and 2c and extending in cross-section in the axial direction groove bottom 2a. The groove bottom 2a is located in the intended for the relevant vehicle pneumatic tire maximum tread depth T P , the opening width b 2 of the circumferential groove 2 on the surface of the profile strip 1 corresponds to the width of the groove bottom 2a. In the Fig. 1 and Fig. 2 To the right of the profile band 1 extending circumferential groove 3 is an example of those in which a transverse groove 4 shown in these figures opens. The circumferential groove 3 has, as in particular Fig. 3 can be seen, extending in cross-section in the axial direction groove bottom 3a and two groove walls 3b, 3c. The groove wall 3c opposite the profile band 1 runs in the radial direction R. The groove wall 3c is the one into which the transverse groove 4 opens and is slightly inclined with respect to the radial direction, in particular at an angle of 1 ° to 10 °, such that the opening width b 3 of the circumferential groove 3 on the surface of the profile strip 1 has a greater axial extent than the groove bottom 3a. The width of the circumferential grooves 2, 3 at the groove bottom 2a, 3a is, as is usual for such circumferential grooves, between 6 mm and 18 mm, the maximum tread depth T P is depending on the tire type and tire dimension usually between 6 mm and 8.5 mm.

In Fig. 1 und Fig. 2 erstreckt sich die Querrille 4 beispielhaft in axialer Richtung. Wie insbesondere Fig. 8 zeigt, können erfindungsgemäß ausgeführte Querrillen 4 alternativ unter einem spitzen Winkel α zur axialen Richtung verlaufen, welcher höchstens 50°, insbesondere bis zu 35°, beträgt. In Fig. 8 beträgt der Winkel α in der Größenordnung von 30°. Der Winkel α wird zwischen der Mittellinie a in der Erstreckungsrichtung einer Basisrille 5 und der axialen Richtung ermittelt. An der Oberfläche des Profilbandes 1 weist die Querrille 4 Begrenzungskanten k1, k2 auf, welche in Draufsicht im Wesentlichen die Seiten eines langgestreckten, gleichseitigen Dreieckes bilden, dessen kleinster Winkel sich am Ende der Querrille 4 im Profilband 1 befindet, sodass die Breite der Querrillen 4 in Richtung Umfangsrille 3 größer wird. Die Begrenzungskante k1 schließt mit der Mittellinie a einen Winkel β1 ein, welcher zwischen 5° und 15° beträgt, die Begrenzungskante k2 schließt mit der Mittellinie a einen Winkel β2 ein, welcher um bis zu 5° größer ist als β1. Das laufstreifeninnenseitige Ende der Querrille 4 befindet sich in einem in axialer Richtung ermittelten Abstand n von der Umfangsrille 2, welcher mindestens 5 mm beträgt. Die Querrille 4 selbst weist eine Erstreckungslänge 1 auf, welche an der Oberfläche des Profilbandes 1 ermittelt wird, und in der Größenordnung von 12 mm bis 25 mm beträgt.In Fig. 1 and Fig. 2 the transverse groove 4 extends by way of example in the axial direction. In particular Fig. 8 shows, executed according to the invention transverse grooves 4 alternatively extend at an acute angle α to the axial direction, which is at most 50 °, in particular up to 35 °. In Fig. 8 the angle α is on the order of 30 °. The angle α is determined between the center line a in the extending direction of a base groove 5 and the axial direction. On the surface of the profile strip 1, the transverse groove 4 has boundary edges k 1 , k 2 , which in plan view essentially form the sides of an elongated, equilateral triangle whose smallest angle is formed is located at the end of the transverse groove 4 in the profile band 1, so that the width of the transverse grooves 4 in the direction of the circumferential groove 3 is larger. The boundary edge k 1 encloses with the center line a an angle β 1 , which is between 5 ° and 15 °, the boundary edge k 2 includes with the center line a an angle β 2 , which is greater than β 1 by up to 5 ° , The tread inside end of the transverse groove 4 is located in a distance n determined in the axial direction of the circumferential groove 2, which is at least 5 mm. The transverse groove 4 itself has an extension length 1, which is determined on the surface of the profile strip 1, and in the order of 12 mm to 25 mm.

Die Querrille 4 weist in Kombination die bereits erwähnte Basisrille 5 und zwei radial außerhalb der Basisrille 5 ausgebildete Rillenflanken 6, 7 auf, welche die Querrille 4 im Querschnitt trichterförmig zur Oberfläche des Profilbandes 1 verbreitern. Die Basisrille 5 befindet sich im radial inneren Bereich der Querrille 4 und erstreckt sich von der Umfangsrille 3 geradlinig in das Profilband 1 über eine Erstreckungslänge l1 von 50 % bis 80 % der Erstreckungslänge l. Der Basisrillengrund 5c befindet sich über die Erstreckungslänge l im Wesentlichen in einer konstanten Tiefe TE (Fig. 7), welche dem radialen Abstand des Einschnittgrundes 5c zur Oberfläche des Profilbandes 1 entspricht. Die Basisrille 5 weist eine konstante Breite von 0,8 mm bis 1,5 mm und zwei parallel zueinander verlaufende Basisrillenwände 5a, 5b auf. Die radiale Erstreckung der Basisrille 5 wird von der radialen Erstreckung der Basisrillenwand 5a bestimmt, die mit der Rillenflanke 7 eine gemeinsame Kante k3 besitzt, die, wie es Fig. 5 zeigt, vom inneren Ende bis zur Rillenwand 3c "abfällt" und deren radialer Abstand c2 zur Oberfläche des Profilbandes 1 an der Rillenwand 3c 5 mm bis 7 mm und an ihrem inneren Ende etwa 1 mm beträgt. Die Basisrillenwand 5b besitzt mit der Rillenflanke 6 eine gemeinsame Kante k4, welche ebenfalls von ihrem inneren Ende zur Rillenwand 3c "abfällt" und deren radialer Abstand c1 zur Oberfläche des Profilbandes 1 an der Rillenwand 3c 2 mm bis 3 mm, an ihrem inneren Ende etwa 1 mm beträgt. Die beiden Rillenflanken 6, 7 verlaufen somit, im Rillenquerschnitt betrachtet, asymmetrisch zur Mittellinie a und ferner über das Ende der Basisrille 5 im Profilband 1 hinaus bis zum Schnittpunkt der Begrenzungskanten k1 und k2 an der Oberfläche des Profilbandes 1. Mit der radialen Richtung schließen die Rillenflanken 6, 7 Winkel β, γ ein, die zwischen 30° und 70° gewählt werden und übereinstimmend groß sein können. Bevorzugt ist eine Ausführungsform, bei welcher der Winkel γ der flächenmäßig kleineren Rillenflanke 6 größer ist, insbesondere um mindestens 3°, als der Winkel β der Rillenflanke 7.The transverse groove 4 has in combination the already mentioned base groove 5 and two radially outwardly of the base groove 5 formed groove flanks 6, 7, which widen the transverse groove 4 in cross section in a funnel shape to the surface of the profile strip 1. The base groove 5 is located in the radially inner region of the transverse groove 4 and extends from the circumferential groove 3 in a straight line in the profile band 1 over an extension length l 1 of 50% to 80% of the extension length l. The base groove bottom 5c is located over the extension length l substantially at a constant depth T E (FIG. Fig. 7 ), which corresponds to the radial distance of the recess base 5c to the surface of the profile strip 1. The base groove 5 has a constant width of 0.8 mm to 1.5 mm and two mutually parallel base groove walls 5a, 5b. The radial extent of the base groove 5 is determined by the radial extent of the base groove wall 5a, which has a common edge k 3 with the groove flank 7, which, as it Fig. 5 shows, from the inner end to the groove wall 3c "drops" and the radial distance c 2 to the surface of the profile strip 1 on the groove wall 3c 5 mm to 7 mm and at its inner end is about 1 mm. The base groove wall 5b has with the groove flank 6 a common edge k 4 , which also "drops" from its inner end to the groove wall 3c and the radial distance c 1 to the surface of the profile strip 1 on the groove wall 3c 2 mm to 3 mm, at its inner End is about 1 mm. The two groove flanks 6, 7 thus, viewed in the groove cross-section, run asymmetrically to the center line a and beyond the end of the base groove 5 in the profile band 1 to the intersection of the boundary edges k 1 and k 2 on the surface of the profile band 1 Direction include the groove flanks 6, 7 angles β, γ, which are selected between 30 ° and 70 ° and can be consistently large. Preferred is an embodiment in which the angle γ of the areal smaller groove flank 6 is greater, in particular by at least 3 °, than the angle β of the groove flank. 7

Fig. 8 zeigt ein Profilband 1', welches von in Umfangsrichtung umlaufenden Umfangsrillen 2', 3' begrenzt ist, welche analog zur Umfangsrille 3 ausgebildet sind. Von den Umfangsrillen 2', 3' erstrecken sich abwechselnd Querrillen 4 in das Profilband 1'. Die Querrillen 4 sind gegenüber der axialen Richtung unter dem Winkel α von etwa 30° geneigt. Bei der gezeigten Ausführungsform verlaufen sämtliche Querrillen 4 übereinstimmend schräg zur axialen Richtung. Fig. 8 shows a profile band 1 ', which is bounded by circumferentially circumferential grooves 2', 3 ', which are formed analogously to the circumferential groove 3. Of the circumferential grooves 2 ', 3' extend alternately transverse grooves 4 in the profile band 1 '. The transverse grooves 4 are inclined relative to the axial direction at the angle α of about 30 °. In the embodiment shown, all transverse grooves 4 run coincidentally obliquely to the axial direction.

Erfindungsgemäß ausgeführte Querrillen können auch in Profilblöcken vorgesehen werden. Die Querrillen können in Profilbändern auf spezielle Weise angeordnet werden. So ist es beispielsweise möglich, in einem Profilband zur axialen Richtung geneigt angeordnete Querrillen mit in axialer Richtung verlaufenden Querrillen zu kombinieren, beispielsweise auch bei einer abwechselnden Anordnung in Umfangsrichtung.According to the invention executed transverse grooves can also be provided in profile blocks. The transverse grooves can be arranged in profile bands in a special way. For example, it is possible to combine in a profile band to the axial direction inclined transverse grooves with extending in the axial direction transverse grooves, for example, in an alternate arrangement in the circumferential direction.

BezugsziffernlisteReferences list

11
Profilbandprofile strip
1'1'
Profilbandprofile strip
22
Umfangsrillecircumferential groove
2'2 '
Umfangsrillecircumferential groove
2a2a
Rillengrundgroove bottom
2b2 B
Rillenwandgroove wall
2c2c
Rillenwandgroove wall
33
Umfangsrillecircumferential groove
3'3 '
Umfangsrillecircumferential groove
3a3a
Rillengrundgroove bottom
3b3b
Rillenwandgroove wall
3c3c
Rillenwandgroove wall
44
Querrilletransverse groove
55
Basisrillebase groove
5a5a
BasisrillenwandBase groove wall
5b5b
BasisrillenwandBase groove wall
5c5c
BasisrillengrundBase groove bottom
66
Rillenwandgroove wall
77
Rillenwandgroove wall
aa
Mittelliniecenter line
b2 b 2
Öffnungsbreiteopening width
b3 b 3
Öffnungsbreiteopening width
c1 c 1
Abstanddistance
c2 c 2
Abstanddistance
k1 k 1
Begrenzungskanteboundary edge
k2 k 2
Begrenzungskanteboundary edge
k3 k 3
Kanteedge
k4 k 4
Kanteedge
ll
Erstreckungslängelength of extension
l1 1
Erstreckungslängelength of extension
nn
Abstanddistance
Ee
EinschnittmittelebeneNick midplane
TE T E
Einschnitttiefecutting depth
TP T P
Profiltiefetread depth
αα
Winkelangle
ββ
Winkelangle
β1 β 1
Winkelangle
β2 β 2
Winkelangle
γγ
Winkelangle

Claims (12)

  1. Pneumatic vehicle tyre with a tread profile, which is divided by circumferential grooves (2, 3, 2', 3') into profile positives running around in the circumferential direction, such as profile strips and/or rows of tread bars, there being provided at least one profile positive (1, 1') that has arranged in it transverse grooves (4) which open out into a circumferential groove (3) delimiting the profile positive and the ends of which are located within the profile strip (1, 1'), the transverse grooves (4) being delimited at the surface of the profile positive by delimiting edges (k1, k2), the distance between which becomes greater in the direction of the circumferential groove (3), characterized
    in that the transverse grooves (4) have in each case in their radially inner region a straightrunning base groove (5) between 0.8 mm and 1.5 mm wide and have in their radially outer region groove flanks (6, 7) running between the delimiting edges (k1, k2) and the base groove (5), the base groove (5) running at least substantially at a constant depth over its extent, but the radial extent of the base groove (5) becoming continuously less from the inner end region of the transverse groove (4) in the direction of the circumferential groove (3), and the one base groove wall (5b) protruding beyond the other base groove wall (5a) in the radial direction, so that the common edges that are formed between the base groove walls (5a, 5b) and the respective groove flanks (6, 7) run at different radial levels.
  2. Pneumatic vehicle tyre according to Claim 1 or 2, characterized in that the radial distance (c2) of the common edge (k3) that is formed between the one base groove wall (5a) and the adjoining groove flank (7) from the surface of the profile positive (1) at the circumferential groove (3) is 5 mm to 7 mm.
  3. Pneumatic vehicle tyre according to Claim 1 or 2, characterized in that the radial distance (c1) of the common edge (k4) that is formed between the other base groove wall (5b), protruding beyond the base groove (5), and the second groove flank (6) from the surface of the profile positive (1) at the circumferential groove (3) is 2 mm to 3 mm.
  4. Pneumatic vehicle tyre according to one of Claims 1 to 3, characterized in that the common edges (k3, k4) have at the inner end of the base groove (5) an approximately equal radial distance from the surface of the profile positive (1), which is less than the radial distances (c1, c2) at the circumferential groove (3) and is preferably at most 1 mm.
  5. Pneumatic vehicle tyre according to one of Claims 1 to 5, characterized in that the groove flanks (6, 7) are surface areas that are inclined in relation to the radial direction at at least substantially equal angles (β, γ).
  6. Pneumatic vehicle tyre according to one of Claims 1 to 5, characterized in that the delimiting edges (k1, k2) of the transverse groove (4) running at the surface of the profile positive (1, 1') converge to a point at the end of the transverse groove.
  7. Pneumatic vehicle tyre according to one of Claims 1 to 6, characterized in that, in the axial direction of extent of the base groove (5), the groove flanks (6, 7) run beyond the end of the latter in the profile positive (1, 1') up to the point of intersection of the delimiting edges (k1, k2).
  8. Pneumatic vehicle tyre according to one of Claims 1 to 7, characterized in that the delimiting edges (k1, k2) provided at the surface of the profile positive (1, 1') run at acute angles of different magnitudes with respect to the centre line of the base groove (5).
  9. Pneumatic vehicle tyre according to one of Claims 1 to 8, characterized in that the base groove (5) has a length of extent that corresponds to between 50% and 80% of the length of extent of the transverse groove (4).
  10. Pneumatic vehicle tyre according to one of Claims 1 to 9, characterized in that in the tread there is provided at least one profile strip (1') which is delimited on both sides by circumferential grooves (2', 3') and into which the transverse grooves (4) open out alternately in the circumferential direction.
  11. Pneumatic vehicle tyre according to one of Claims 1 to 10, characterized in that the transverse grooves (4) run at an angle of up to 50° with respect to the axial direction.
  12. Pneumatic vehicle tyre according to one of Claims 1 to 11, characterized in that in the tread there is provided at least one profile strip in which all of the transverse grooves (4) run at substantially coinciding angles with respect to the axial direction.
EP13180011.2A 2012-09-20 2013-08-12 Pneumatic tyre for a vehicle Not-in-force EP2711200B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210108847 DE102012108847A1 (en) 2012-09-20 2012-09-20 Vehicle tires

Publications (2)

Publication Number Publication Date
EP2711200A1 EP2711200A1 (en) 2014-03-26
EP2711200B1 true EP2711200B1 (en) 2017-01-18

Family

ID=48949072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13180011.2A Not-in-force EP2711200B1 (en) 2012-09-20 2013-08-12 Pneumatic tyre for a vehicle

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EP (1) EP2711200B1 (en)
DE (1) DE102012108847A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6510797B2 (en) 2014-11-11 2019-05-08 株式会社ブリヂストン Pneumatic tire
JP6473393B2 (en) * 2015-07-13 2019-02-20 住友ゴム工業株式会社 Pneumatic tire
US10780743B2 (en) * 2017-03-16 2020-09-22 Sumitomo Rubber Industries, Ltd. Tire
JP7144279B2 (en) * 2018-10-22 2022-09-29 Ｔｏｙｏ Ｔｉｒｅ株式会社 pneumatic tire
EP3842263B1 (en) * 2019-12-27 2023-07-12 Sumitomo Rubber Industries, Ltd. Tyre
JP2022095399A (en) * 2020-12-16 2022-06-28 住友ゴム工業株式会社 tire
JP2023090288A (en) 2021-12-17 2023-06-29 住友ゴム工業株式会社 tire

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Publication number Priority date Publication date Assignee Title
IT1101233B (en) * 1978-12-22 1985-09-28 Pirelli TREAD DESIGN WITH SIDE GROOVES
DE502004011794D1 (en) * 2004-03-26 2010-12-02 Continental Reifen Deutschland Vehicle tires
JP4755709B2 (en) * 2009-08-03 2011-08-24 住友ゴム工業株式会社 Pneumatic tire

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP2711200A1 (en) 2014-03-26
DE102012108847A1 (en) 2014-03-20

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